Copying Incremental Data


I am using elasticsearch version 6.5.1

I have 2 indexes, say index1 and index2, index2 is reindexed from index1 with same mapping,
new data will keep come to index1, i want to copy incremental data to index2 from index1 ? could someone help me?

Thank you,

What's the reasoning for reindexing the data if there's no mapping changes?

Index1 is using for production and index2 is reindexed for my testing purpose, i want to map more fields and ingest data on those fields, if it works then i'll do the same to production index.

Ok, well you can use CCR between clusters, but there's not anything for intra-cluster "replication" like this.

Hi Mark, thank you for the suggestion,

can i use range query using timestamp ? I am trying to run the following query and getting following result, but nothing updating my destination index, could you please help me what am i doing wrong here ?

POST _reindex
  "source": {
    "index": "source_index",
    "query": {
    "range": {
      "timestamp": {
        "gte" :  "May 19th 2020, 18:23:21.317",
        "lt": "now/d"
  "dest": {
    "index": "dest_index"


  "took" : 295,
  "timed_out" : false,
  "total" : 0,
  "updated" : 0,
  "created" : 0,
  "deleted" : 0,
  "batches" : 0,
  "version_conflicts" : 0,
  "noops" : 0,
  "retries" : {
    "bulk" : 0,
    "search" : 0
  "throttled_millis" : 0,
  "requests_per_second" : -1.0,
  "throttled_until_millis" : 0,
  "failures" : [ ]

solved the issue by changing "gte" : "2020-05-19T18:23:21", and putting @ before timestamp(@timestamp), is there a way that i can automate this process? searching latest timestamp in source index and run the reindex job in cron ?
Thank you.

There's no cron type approach for reindex, no. You'd need to do it externally.

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